Ignoring ***** transactions on client accounts

I don't even know where to begin, I received 6 transactions on my FNB account for R500 each, totaling R3000. This happened within a 5 minute timeframe and they all came from Uber. I was at home when this happened, I contacted Uber and the end result of their investigation is that the transactions came from another Uber account and that they are legit transactions so the case is closed. How can they think it is acceptable for 6 transactions of EXACTLY R500 each to go off my account and not suspect *****. This is such joke and the best part is that they are not doing anything to resolve this and refund my money.